Deep-Ocean Conditions After 'Snowball Earth' (4 of 4) (IMAGE)

American Association for the Advancement of Science (AAAS)

Deep-Ocean Conditions After 'Snowball Earth' (4 of 4)

Caption

These are domal stromatolites from the Cryogenian Trezona Formation. These layered accretionary structures created by biofilms of microbes formed in a shallow-water tropical environment in the Adelaide Rift Complex about 650 million years ago. This image relates to an article that appeared in the April 30, 2010, issue of Science, published by AAAS. The study, by Dr. N.L. Swanson-Hysell at Princeton University in Princeton, NJ, and colleagues, was titled, "Cryogenian Glaciation and the Onset of Carbon-Isotope Decoupling."

Credit

Image courtesy of Nick Swanson-Hysell

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